From personal experience I tend to draw mythic rare cards about one in five purchases when buying individually packaged boosters at Target, Walmart, etc, like the ones in this picture:
In booster boxes I have never gotten more than 6 mythics. This led me to think about this for a moment. If Wizards can profit more from individually packed boosters, wouldn't they want to have people draw mythics more often from them? My reasoning is that a non-serious gamer would not buy a booster box, but would be more likely to buy individual packs. If this person gets mythics with just a few packs, that would be a good incentive to come back for more.
So my question is this: Are the odds of drawing mythics greater when purchasing individually packed booster card packs over booster boxes? Has anyone ever compared the odds? (I'm not quite ready to shell out $1000 to find out.)